UCC3808N-1

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The UCC3808N-1 is a PMIC (Power Management IC) in the form of a cost-effective, low-power AC DC converter and offline switcher targeted for a wide range of applications, including PWM motor control, lighting control, digital hearing aids, and appliances. The PMIC offers an integrated solution that combines Synchronous Rectification (SR) and Linear Regulators (LRs) to provide efficient and reliable power supply performance.

The UCC3808N-1 can be used in applications involving AC line input voltage of 85 to 265 VAC or up to ±18 VDC. It contains a synchronous rectifier controller and a linear regulator controller, which together with the external MOSFETs, the inductor, and the power filter capacitors, provide a synchronous rectifier based topology that is highly effective in current-mode controlling and low EMI noise operation. The device can deliver an output current up to 0.8 A and output voltage up to 26 V.

The UCC3808N-1 is simple to configure as it contains in-built protection features such as Output Over Voltage Protection, Output Short Circuit Protection, Over Voltage Limiting, Over Voltage Recovery, and Over Current Protection. It also contains a Low EMI mode to significantly reduce electromagnetic interference in the application. The Low EMI mode can be enabled or disabled by an external control pin.

The working principle of the UCC3808N-1 is based on a synchronous rectifier with a linear regulator combo design. The synchronous rectifier controller provides a current mode control over the external switching MOSFETs. The linear regulator controller drives the external N-channel MOSFET to obtain the required output voltage. The device also contains a constant frequency oscillator and a peak current loop, which provides excellent line and load regulation. The external components of the UCC3808N-1 provide additional filtering benefits, while its integrated protection features, EMI mode and over power protection provide robust operation.

The UCC3808N-1 offers several features that make it well suited to a wide range of applications. Its fully integrated solution offers improved efficiency, size, and reliability. It also includes an integrated current-mode controller and offers low EMI noise operation, output over voltage protection, output short circuit protection, over voltage limiting, over voltage recovery, and over current protection. This makes it an ideal solution for cost-sensitive applications.

The UCC3808N-1 is a low-power AC DC converter and offline switcher suitable for various AC line input voltage or an up to ±18 VDC requirement in a wide range of applications, including PWM motor control, lighting control, digital hearing aids, and appliances. It offers efficiency, size, and reliability and contains an integrated current-mode controller, with in-built protection features, output over voltage protection, output short circuit protection, over voltage limiting, over voltage recovery, and over current protection to ensure robust operation.

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